Mexico is being touted as a new frontier for Canada’s oil and gas industry as its government opens the energy sector to foreign investment for the first time in more than 70 years.

During a three-day visit to Mexico City and Toluca last week, Prime Minister Stephen Harper and Natural Resources Minister Joe Oliver spoke enthusiastically about new opportunities for Canadian firms. Mr. Harper was in the country for a North American leaders summit with Mexican President Enrique Pena Nieto and U.S. President Barack Obama.